Platen printing-machine.



No. 873,609. u n PATENTED DEC. 10, 1907. M. ROGKSTROH. PLATBN PRINTING MACHINE.

APPLICATION FILED JUNE 4.1907.

3 SHEETS-SHEET 1.

1H: norms PETER: cu., WASHINGTON, D. c.

PATIIN'IED DEG. l0, 1907 M. ROCKSTROH. PLATEN PRINTING MACHINE.

APPLIOATION FILED JUNE 4,1907.

3 SHEETS-SHEET 2.

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No. 873,609. PATENTED DEC. l0, 1907.

M. ROGKSTROH. PLAIEN PRINTING MACHINE.

APPLIGATION FILED JUNE 4.1907.

3 SHEETS-SHEET 3'.

UNrTnn sTA'rns PATENT OFFICEe PLATEN PRINTING-MACHINE.

Specification of Letters Patent.

Patented Dec. 10, 1907.

Application filed .Tune 4. 1907. Serial No. 377.279.

T o all whom t may concern:

Be it known that I, MAX RooKsTRoH, di rector, a subject ofthe Kingdom of Saxony, residing at Klein-Sedlitz, near Pirna, Saxony, German Empire, have invented certain new and useful Improvements in and Relating to Platen Printing-Machines, of which the following is a specification. Y

This invention has reference to improvements in and relating to platen printing machines in which the inking rollers are actuated from a shaft which is intermittently oscillated by or through a crank on a toothed wheel which has been driven by a wheel without teeth on a part of its periphery, or, the toothed wheel has been driven continuously'and coupled to the crank when required by a friction clutch. This invention has for its object the provision of improved means by which the shaft carrying the ink roller actuating lever is coupled and uncoupled to and from the driving mechanism with greater certainty and in a more positive manner than heretofore.

In the accompanying drawings which form part of this specification and are referred to on the following detailed description of the invention, Figure l is a side elevation of part of a platen printing machine showing the application of the improved mechanism, Fig. 2 is a part sectional front elevation yof the l same, Fig. 3 is a part sectional plan, Fig. 4

is a detail showing the cam, and Fig. 5 is a detail in longitudinal section showing the socket.

In a machine of the type herein referred to the inking rollers are mounted in a frame a which is connected tothe operating shaft f by links 't and by levers z, fixed upon the said shaft- Loosely mounted upon the same shaft is a lever 7c which has a long socket l and on one side has a quadrant shaped face. The lever c is connected by a link e to the crank wheel d which is continuously rotated from the driving shaft t by a pinion c mounted thereon. Fixed upon the shaft f there is another lever g which carries a pin m, and this pin is provided with a spring which tends to force the pin in the direction of the lever 7c, and into the socket l on such lever and there is a head o by which the pin can be drawn clear of the lever 7c. The shaft f is also provided with a third lever n which is loosely mounted thereon and at one end is provided with a cam shaped piece a which is designed to operate upon the pin m through its head o. The other end of the lever n is coupled by a link t to a cam lever s and this is provided with a roller 1 which is operated by a cam g on the main wheel g which is driven from the driving shaft t by the pinion u.

In the arrangement shown the wheel d revolves at twice the speed of the wheel g and the parts are shown in the position they occupy when the roller r has been nearly raised to the highest part of the cam g and the lever g has been disconnected from the lever c by the withdrawal of the bolt m through the action of the cam a. During the next revolution of the wheel d the lever 7c oscillates to and fro on the shaft f, and during the same time the position I of the wheel g has been turned to the position II and the roller r has moved to the lowest part of the cam q. During this movement of the roller r the pin m has been liberated from the cam n and by its spring has been held in contact with the quadrant face of the lever 7c so that when the socket Z comes opposite to the pin m, this pin is forced forward by its spring andthe levers g and 7c are coupled together'. The next revolution of the wheel d, through the levers g and k, oscillates the shaft f by which the ink rollers are moved to and fro over the type until they arrive in the position shown when the roller 1" comes into contact with the nose of the cam q and the levers g and k are uncoupled. The motion given to the roller r by the nose of the cam is so designed that the levers g and lc are uncoupled before the roller reaches the highest part of the cam, and after the levers are uncoupled the roller r is moved a farther distance w to insure the end of vthe pin m being drawn clear of the hole in the lever c.

Having now particularly describedand ascertained the nature of my said invention and in what manner the same is to be performed I declare that what I claim is 1. In a platen printing machine, 'an inkng mechanism, an operating shaft therefor, an actuating lever for said shaft loosely mounted thereon and having a quadrant-shaped portion and a socket, a lever fixed on said shaft and carrying a spring-pressed headed pin adapted to engage in said socket for coupling the actuating lever to the shaft, a lever loosely mounted upon said shaft and carrying a roller and a cam piece, said cam piece adapted to intermediately engage the head of the pin for shifting the pin out of said socket, thereby uncoupling the actuatl ing lever from the shaft, a rotatable cam adapted to engage With said roller causing l thereby the shifting of said loosely mounted lever and the engaging of the cam piece With the head of the pin, and means connected with the actuating lever for oscillating it.

2. A platen printing machine comprising the combination With an inking mechanism and an operating shaft for intermittently actuating said mechanism, of an actuating means for said shaft, said means comprising a lever fixed to the shaft, an actuating lever I loosely mounted upon the shaft, means carried by the fixed lever and adapted to eni gage the actuating lever for coupling said actuating lever to the shaft, means for interl mittently uncoupling the actuating lever from said xed lever, and means connected with the actuating lever for oscillating it.

3. 'In a platen printing machine, the combination with an inking mechanism and an operating shaft for intermittently actuating said mechanism, of means for intermittently operating said shaft, said means comprising an actuating lever loosely mounted upon the shaft, a lever fixed to the shaft and carrying a spring-pressed coupling member adapted to engage the actuating lever for coupling the latter to the shaft, a cam and lever mechanism for. intermittentlyshifting said coupling member from engagement With said actuating lever, and means for oscillating said actuating lever.

In testimony whereof I have hereunto set my hand in presence of two subscribing Witnesses.

MAX ROCKSTROH.

Witnesses:

PAUL ARRON, CLRE SIMON. 

